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# Chemical and Ionic Equations Quiz PDF: Questions and Answers - 59

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## Chemical & Ionic Equations Questions and Answers : Quiz 59

MCQ 291: What is correct about acids?

A) they are solid crystals
B) they are aqueous
C) they are gases
D) they are liquid

MCQ 292: Molar mass of Calcium Carbonate CaCO3 is

A) 100.0869 g/mol
B) 99.0154 g/mol
C) 110.018 g/mol
D) 101.087 g/mol

MCQ 293: If the nucleon number of potassium is 39, the number of neutrons will be

A) 39
B) 19
C) 20
D) 29

MCQ 294: Which one of these is an incorrect statement about an exothermic reaction?

A) it form a compound which gives out heat while being formed
B) it contains products that are very stable
C) it results in overall enthalpy change zero
D) it gives overall negative enthalpy

MCQ 295: Consider the reaction: CuO + H2SO4 → CuSO4 + H2O. The salt is obtained through the

A) crystallization
B) fractional distillation
C) vacuum distillation
D) centrifugation

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